1)   Blue Frog Anti Spam 1.8.1
Blue Frog actively fights spam and makes spammers leave you alone. Blue Frog posts complaints on sites advertised by spam. Report your spam from any email client or let Blue Frog report Gmail, Hotmail and Yahoo spam directly from the Firefox browser

 2)   Blue Frog Anti Spam (for Firefox) 1.8.1
Blue Frog makes spammers leave you alone. The Blue Frog Firefox extension reports spam reaching your Gmail, Hotmail or Yahoo mailbox. Blue Frog Desktop client fights spam by posting complaints on the sites advertised by the spam you receive.